Phrases with the structure 不A不B
不A不B 
phrases have the same meaning as phrases in English. For "A" and "B", we usually use words with the opposite meaning, but there may be exceptions.
phrases have the same meaning as phrases in English. For "A" and "B", we usually use words with the opposite meaning, but there may be exceptions.
Pay attention
Remember the following fixed expressions.
不大不小
不三不四
不长不短
不左不右
不上不下
不慌不忙
不明不白
不男不女
不三不四
不长不短
不左不右
不上不下
不慌不忙
不明不白
不男不女 Pay attention
The particle 不 is pronounced with the second tone when it goes before words with the fourth tone — bú.
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